Press Machine and Method of Displaying Operating State of Press Machine

1. A press machine configured to press a workpiece, the press machine comprising: a display configured to display a band-shaped state display image having a length and a width, and representing an operating state of the press machine over a predetermined period of time up to a current time in a direction along the length of the band-shaped state display image, wherein the band-shaped state display image comprises unit images arranged along the direction, and each unit image indicates the operating state of the press machine at a unit time, wherein each of the unit images shows a color that is a mixture of two or more colors corresponding to respective two or more evaluation values for evaluating the operating state of the press machine, wherein the two or more evaluation values are calculated based on respective different evaluation criteria, wherein the two or more colors in each unit image are set with gradation values corresponding to magnitudes of the respective two or more evaluation values, and wherein the display is configured to display time series variation in the operating state during the predetermined period of time based on the color varying in the direction along the length of the band-shaped state display image.

2. The press machine according to claim 1, wherein the two or more evaluation values include three types, and the two or more colors include three colors of red, green, and blue.

3. The press machine according to claim 1, wherein the two or more evaluation values include at least one evaluation value calculated by machine learning.

4. The press machine according to claim 1, wherein the two or more evaluation values include: a degree of abnormality in the press machine calculated by machine learning; production stability of the press machine; and a manual operation frequency of the press machine.

5. The press machine according to claim 4, wherein the two or more colors include three colors of red, green, and blue, a larger gradation value of the red is assigned to a value of the degree of abnormality indicating that the operating state is in a more abnormal state, a larger gradation value of the green is assigned to a value of the production stability indicating that the operating state is in a more stabler state, and a larger gradation value of the blue is assigned to a value of the manual operation frequency indicating that the operating state is in a more stabler state.

6. The press machine according to claim 1, wherein the band-shaped state display image displays the operating state of a current time at one of both ends in the direction, and displays the operating state corresponding to an elapsed time, from the one end at which the operating state of the current time is displayed toward the other end.

7. The press machine according to claim 1, wherein the display is further configured to display the band-shaped state display image, an operation related information image of the press machine, and a degree-of-abnormality display image displaying the degree of abnormality in the press machine.

8. A method of displaying an operating state of a press machine, the method comprising displaying, on a display, a band-shaped state display image having a length and a width, wherein the band-shaped state display image represents an operating state of the press machine over a predetermined period of time up to a current time in a direction along the length of the band-shaped state display image, wherein displaying the band-shaped state display image includes arranging unit images along the direction, each unit image indicating the operating state of the press machine at a unit time, wherein displaying the band-shaped state display image includes assigning each of the unit images a color that is a mixture of two or more colors corresponding to respective two or more evaluation values for evaluating the operating state of the press machine, wherein the two or more evaluation values are calculated based on respective different evaluation criteria, wherein displaying the band-shaped state display image includes setting the two or more colors in each unit image with gradation values corresponding to magnitudes of the respective two or more evaluation values, and wherein displaying the band-shaped state display image includes displaying time series variation in the operating state during the predetermined period of time based on the color varying in the direction along the length of the band-shaped state display image.

9. The method of displaying the operating state of the press machine, according to claim 8, wherein displaying the band-shaped state display image further includes an operation related information image of the press machine, and a degree-of-abnormality display image for displaying a degree of abnormality of the press machine.